Hammer



FIG. 1 is a perspective view of a hammer showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is a side view thereof.

The other side of the design is a mirror image of the side shown in FIG. 6. 

The ornamental design for a hammer, as shown and described. 